Blender crashes switching from curve editor to 3D view
You could try limiting the texture size temporarily until you can get the issue worked out. This may help avoid large amounts of memory being reserved, and causing Blender to crash.

Press ctrl + alt + u to open the "User Preferences".

Switch to the "System" tab and change your Texture Size Limit.



This should limit the size of the textures, speeding up the viewport.

I recommend NOT clicking "Save User Settings" if you don't want this limit on your future Blend files.